Keystones — Capstone
Five GCSE retrieval questions · 30 January 2026 · mathsvault.uk/keystones
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1. Number Index law — powers of powers
Simplify: ((a4)2)2
Answer: a16 -
2. Algebra Quadratic nth term
Determine the nth term: 12, 21, 36, 57, ...
Answer: 3n² + 9 -
3. Geometry Equation of a circle
State the equation of a circle with centre (3, 8) and radius 10
Answer: (x - 3)² + (y - 8)² = 100 -
4. Ratio Changing a ratio
In ratio 2:3, if the second quantity is 21, what is the first?
Answer: 14 -
5. Statistics Range
Find the range of: 11, -30, -22, 37, -5
Answer: 67